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Cornerstone · Grades 3–5 Keystones #1 14 February 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 14 February 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄6 + 6⁄7

    Answer: 25⁄21
  2. 2. Algebra Two-step equations

    Solve: 6x - 17 = 67

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 130 in the ratio 2:1:2

    Answer: 52, 26 and 52
  5. 5. Statistics Mean

    Find the mean of: 10, 7, 4

    Answer: 7

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